KA975 Low Pressure Ceramic Diffuser DELIVERY SYSTEMS ARE THE MOST IMPORTANT PART OF AERATORS KeepAlive® now manufactures a low pressure ceramic diffuser with micro bubbles that dramatically improves the efficiency of your aerator. They are expensive in comparison to air stones because of the intensive manufacturing process. If properly maintained, your low pressure ceramic diffuser will provide for many years of efficient service. Our KA975 low pressure ceramic diffuser operates at 2 psi, and produces a uniformed bubble pattern with micro bubbles that dramatically improves the efficiency of any aerator. With proper care, your investment in a low pressure ceramic diffuser will provide many years of service as you replace worn out bubble aerators. KA975 comes complete with 1’ hose and reducing barb to adapt to your aerator.